Road working apparatus



Jan. 1, 1935. c. A. GUsTAFsoN 1,986,147

ROAD WORKING APPARATUS Filed'Sept. 25, 1950 5 SheeS-Sheet l O O A l o @eQ o u l m m g o Q` ln s W m v N Y0 /y m n Si f( L N3 n f3 o 2 M o o jl\` f c v' o 90 o INvENToR 4.7-- CARL AGUSTAFSON "Il" www ,n

ATTORNEYS Jan. 1, 1935. c. A. GUSTAFSON ROAD WORKING APPARATUS FiledSept. 25, 1930 5 Sheets-Sheet 2 Arron/nys `1an. 1, 1935. c; A,.GUSTAFSQN 1,986,147

ROAD WORKING APPARATUS Filed Sept. 25, 1930 5 Sheets-Sheet 3 INVENToRCARL. A. GUSTAN-'50N ATTORNEYS Jan. 1, 1935. c. A. GUsTAFsoN ROADWORKING APPARATUS 5 Sheets-Sheet 4 Filed Sept. 25, 1950 lOl INvENToR w 5N F n A w T 5 nw M @QV A. f L www C 5 Sheets-Sheet 5 C. Al GUSTAFSONROAD WORKING APPARATUS Filed Sept. 25, 1930 Jan. l, 1935.

ATToHNEs/s l w E- Patented Jan. l, 1935 ROAD WORKING APPARATUS Carl A.Gustafson, Minneapolis, Minn., assignor to Caterpillar Tractor Co.,Minneapolis, Minn., a corporation of California Application September25, 1930, Serial No. 484,366

49 Claims.

This invention relates to improvements in road working apparatus, andmore particularly to an improved control mechanism for relativelyadjusting the position of the usual ground-engaging tool or toolsthereof with respect to the ground.

An object of the invention is to provide a road working apparatusincluding a ground-engaging tool provided with suitable lifting devicesfor adjustably supporting it, and a power-operated conl j trol mechanismhaving means for selectively actuating said lifting devices torelatively'adjust the position of the tool with respect to the ground.

A further object is to provide a road working machine including aground-engaging tool, means l.; for adjustably supporting said tool,power means for propelling the apparatus, and a control mechanism foractuating said tool-supporting means to relatively adjust the positionof the tool with respect to the ground, said mechanism being operativelyconnected with said power means.

A further object is to provide a power lift for the tools of a roadworking machine, comprising a gear mechanism operatively connected witha suitable power device and including a plurality of spaced-apartcontrol shafts adapted to be connected with the usual operating shaftsof the grader tools, and having means for selectively controlling theoperation of the shafts, whereby the grader tools may be relativelyadjusted independently of each other, and whereby the opposite ends ofcertain of said tools are adapted for independent adjustment.

A further object is to provide a power-operated control mechanismadapted for use in connection 5 with a road working machinel to actuatethe usual lifting devices supporting the ground-engaging tools thereof,said control mechanism being provided with means for operativelyconnecting it with the usual power take-olf of a power unit, so lthatthe work of adjusting the grader toolsmay be accomplished by the simplemanipulation of small hand levers conveniently located with respect tothe operators seat.

A further object is to provide a power-operated control mechanismadapted for use in connection with the tools of a road grader, adaptedto be mounted upon a tractor and to be directly connected with theengine thereof, and telescopic shafts operatively connecting saidcontrol mech- 50 anism with the various lifting devices provided uponthe grader for actuating the ground-engaging tools thereof, and wherebythe operation of said lifting devices may be accomplished by the powerof the tractor engine, vcontrolled by an operator stationed upon thetractor.

A further object is to provide a power-operated control mechanism of thecharacter described, comprising a casing having an upright shaft mountedtherein and adapted to be operatively connected to the power take-offshaft of the tractor engine, and a plurality of control shafts beingmounted within said casing in spaced relation and each having a pair ofgears rotatably mounted thereon, and the corresponding gears of eachpair of gears meshing with each other and having a driving connectionwith said upright shaft whereby, when the engine shaft is rotating, thegears on each shaft will rotate loosely thereon in opposite directions,and a clutch member being slidably mounted upon each control shaft andprovided with means for selectively moving it into and out ofinterlocking engagement with said gears whereby the direction ofrotation of said shafts may be controlled, said shafts being operativelyconnected with the usual scraper blade and scarifier of the road nishingmachine, whereby said tools may be relatively adjusted by the power ofthe engine, controlled by the simple manipulation of a plurality of handlevers conveniently located exteriorly of said casing and connected withsaid clutch members.

A further object is to provide a power operated control mechanism forcontrolling adjustment of the operating parts of road machines.

A further object is to provide improved controllable clutch connectionsfor selectively transmitting the drive from a power driven shaft to oneor more of a plurality of driven shafts having clutch mechanisms mountedthereon.

A further object is to provide a power operated control mechanismincluding clutches and control mechanisms therefor which can beinstalled and removed as a unit.

A further object is to provide a power operated control mechanism havinga support which houses the drive therefor, and serves to position themechanism adjacent the operators station.

Features of the invention reside in the particular arrangement andmounting of the con- 4 trol mechanism upon the tractor; in the simpleand inexpensive construletion of the movable parts of the controlmechanism; and, in the shapes of the engaging faces of the clutch teethwhich are so designed that to retain the slidable clutch members inoperative positions, the operator must manually hold the control leversin such positions, otherwise the slidable clutch members will beautomatically returned to their neutral inoperative positions by a camaction,

resulting directly from the face angles of the clutch teeth.

Other objects of the invention will appear from the followingdescription and accompanying drawings and will be pointed out in theannexed claims.

In the accompanying drawings, there has been disclosed a structuredesigned to carry out the various objects of the invention, but it is tobe understood that the invention is not confined to the exact featuresshown as various changes may be made within the scope of the claimswhich follow.

In the drawings:

Figure 1 is a side elevation illustrating the rear portion of a tractorwith the improved power control mechanism mounted thereon and showingits connection with the operating shafts of a conventional type of roadgrader, the forward portion of which is shown;

Figure 2 'is a plan view of Figure 1;

Figure 3 is a rear end view of the tractor, showing the position of thecontrol mechanism thereon;

Figure 4 is a side elevation of the control mechanism;

Figure 5 is a vertical sectional view on the lines 5-5 of Figures 4 and6;

Figure 6 is a vertical sectional elevation on the line 6--6 of Figure 5,showing a portion of the tractor and a means for connecting the controlmechanism to the engine housing;

Figure 'I is a detail sectional plan view on the line '7-7 of Figure 5;

Figure 8 is a detail sectional plan view on the line 8 8 of Figure 5;

Figure 9 is a fragmentary view illustrating a portion of the face of oneof the clutch elements; and

Figure 10 is a fragmentary sectional view showing the angle of theengaging faces of the teeth of the slidable clutch members and thecomplemental teeth of the clutch elements.

In the selected embodiment of the invention here shown, there isillustrated in Figures 1 and 2, a portion of a tractor and a road gradersimilar to the tractor and grader shown in my pending application,Serial No. 449,206, filed May 2, 1930.

The tractor shown is of the usual crawler type, and comprises thetraction belts 2 supported upon suitable drivers 3 operatively connectedwith the tractor engine. An operator or drivers seat 4 is shown mountedat the rear portion of the tractor adjacent to a power-operated controlmechanism, indicated generally by the numeral 5. This mechanism is shownsupported upon thc engine housing 6 by means of a suitable extensionbracket 7, best shown in Figure 6.

'I'he grader here shown comprises a main frame, 8, the forward portionof which is shown supported upon suitable carrying wheels 9, mountedupon an axle 11 having a pivotal connection with the grader frame 8 topermit turning movement of the grader. The grader is also shown providedwith the usual draft pole 12, the forward end of which is adapted to beconnected with the usual draw bar of the tractor, as indicated at 13 inFigure 1. A suitable spring 14 is shown for counterbalancing a portionof the weight of the grader pole 12.

A scariiier 20 is shown connected with the forward portion of the graderby draft members 15, anda suitable lifting device 16 is mounted upon thegrader frame for adjusting the position of the 1,osc,147

scarifler with respect to the ground. Rods 17 connect the scariiler withcrank arms 18, having geared connections 19 with the lifting device 16.An operating shaft 21 connects the lifting device 16 with a telescopicoperating shaft 22, which, in turn is connected with the controlmechanism 5, as shown in Figure 1. 'I'he shaft 21 is connected with theshaft 22 by a suitable universal joint 23 and, in like manner, theforward end of the shaft 22 is connected to the control mechanism 5 by asimilar joint 24.

The scraper blade 25 of the grader is shown secured to the usualauxiliary frame 26 having a pivotal connection with the forward end ofthe grader frame. 'I his auxiliary frame, as is customary in machines ofthis kind, is adapted for vertical adjustment, and, in the presentinstance, the auxiliary frame 26 is actuated by means of suitable screwlifts, indicated generally by the numerals 27 in Figures 1 and 2. Thesescrew lifts are illustrated in detail in the above mentioned pendingapplication, and it is therefore thought unnecessary to show the same indetail in the present application.

The auxiliary frame 26 is provided with two screw lifts 27, as shown inFigure 2, one situated at each side of the main frame of the grader.

The screw lift at the left hand side of the grader has one end of acontrol shaft 28 connected therewith, the opposite end of which issupported in a standard 29 mounted upon the forward portion of thegrader frame. A telescopic shaft 31 is connected with the operatingshaft 28 by a suitable universal joint 32, and the forward end of theshaft 31 is connected to the control mechanism 5 by a similar universaljoint 33. The screw lift at the right hand side of the grader is shownprovided with an operating shaft 34, the forward end of which also issupported in the standard 29. This shaft has a universal joint 35connecting it with a telescopic shaft 36, the forward end of which isconnected to the control mechanism 5 by a universal joint 37. It is tobe understood that the screw lifts 27 are mounted for universal movementupon the grader frame to allow for lateral and swinging adjustments ofthe scraper blade and its supporting frame 26.

An important feature of the present invention resides in the meansprovided whereby the power required for actuating the tool-supportingmeans, or lifting devices 16 and 27 of the grader, may be taken from thepower unit provided for propelling the apparatus, thereby making theoperation of adjusting the ground-engaging tools much easier and simplerfor the operator.

The power operated grader mechanism herein disclosed, is best shown inFigures 5 and 6, and comprises a casing 38 provided at one side witha-demountable cover 39. 'A depending hub 41 is provided at the lowerportion of the casing 38 and has an annular flange 42 adapted to beseated upon a housing 43 secured to the extension bracket '1, bysuitable bolts 44, as shown in Figures 6 and 7. An upright shaft 45 ismounted within the hub 41 of the casing, and is shown provided at itslower end with a worm wheel 46, meshing with a worm 47 secured to a stubshaft 48, shown mounted in anti-friction bearings 49 and 51 provided inan o-set portion 52 of the housing 43. A cap 53 is demountably securedto one end of the off-set portion 52, whereby access may be had to theinterior thereof. The stub shaft 48 is operatively connected to one endof a shaft extension 54 by a suitable coupling member 55. The oppositeend of the extension 54 is simikure 6.

larly connected to the power take-oil' shaft 55' of the tractor engine,by a coupling member 56. The intermediate portion of the shaft extension54 may be supported in a suitable anti-friction bearing 57, as shown inFigure 6. By thus connecting the upright shaft 45 with the powertake-olf shaft 55' of the tractor engine, the shaft 45 will rotatesynchronously with the engine shaft.

It is to be noted that bracket 7 and housing 43 not only house the drivefor the power-operated control mechanism, but also serve to positionsaid mechanism adjacent the operators station.

A bevel gear 58 issuitably secured to the upper end of the upright shaft45 and meshes with pinions 59 and 61, loosely mounted upon a fixed shaft62. These pinions are arranged to rotate in opposite directions, whenthe gear 58 is operated.

ISuitable gears 63 and 64 are secured to the bevel gears 59,and 61,respectively, and mesh with a pair of gears 65 and 66 rotatably mountedupon a control shaft 67, supported in suitable bearings provided in thecasing 38 and cover 39.

Clutch teeth 68 are provided upon the inner faces of the gears 65 and 66adapted to mesh with clutch teeth 69 provided upon the opposite ends ofa clutch member 71, non-rotatably mounted upon the control shaft 67, andadapted to be moved in a direction lengthwise of the shaft 67, to movethe teeth of the clutch member 71 into and out of driving engagementwith the clutch teeth on the gears 65 and 66, to control the directionof rotation of the control shaft 67. The control shaft 67 isshown'provided with a tapered end portion 72 upon which one-half of theuniversal joint 33 is mounted andsecured, as shown in Figures 1 and 4.

Referring to Figure 1, it will be noted that the control shaft 67 isoperatively connected to the telescopic shaft 31, which shaft cooperateswith the shaft 28 to operatively connect the lifting device 27, situatedat the lefthand side of the grader frame, with the control shaft 67 Asimilar control shaft 73 is shown mounted directly above the controlshaft 67, and is provided with gears 74 and 75 mounted for relativerotation thereon. These gears mesh with the corresponding gears 65 and66 mounted upon the control shaft 67.

Clutch teeth 76 are provided upon the inner faces of the gears 74 and75, adapted to mesh with clutch' teeth 77, provided upon a clutch member78 slidably and non-rotatably mounted upon the control shaft 73. Thecontrol shaft 73 is shown operatively connected with the screw lift 27at the right hand side of the grader frame by means of the telescopicshaft 36 and operating shaft 34.

The lifting device 16 of the scarifler 20 is adapted to be actuated by acontrol shaft 79 also mounted within the casing 38, as shown in Fig-Gears 81 and 82 are loosely mounted on the control shaft 79 and meshwith the gears 74 and 75 mounted on the control shaft 73. Clutch teeth83 are provided upon the inner faces of the gears 81 and 82 adapted tomesh with teeth 84 provided upon a clutch member 85 slidably andnon-rotatably mounted upon the control shaft 79. Referring to Figure 6,it will be noted that the train of gears 63, 65, 74, and 8l, and alsothe train of gears 64, 66, 75, and 82 will rotate continuously with theshaft 45, when the engine shaft 55 is rotated. The two gears on eachcontrol shaft, however, will rotate in opposite directions, as willreadily be understood by reference to Figure 6.

'I'he means provided for selectively moving the clutch members 71, 78,and 85 into and out of driving connection with the gears mounted upontheir respective shafts 72, 73, and 79 is best shown in Figures and 8,and consists of a plurality of hand levers 86, 87, and 88, the first twocontrolling the vertical adjustment of the grader blade 25, and thelatter lever 88 controlling the vertical adjustment of the scarier 20.The lever 86 has an olf-set portion 89 terminally connected with one endof a rod 91, the opposite end of which has threaded engagement with yoke91A which is pivotally connected with an arm 92 suitably secured to acrank shaft 93 having an arm' 94 connected with the clutch member 71, sothat when the crank shaft 93 is actuated by movement of the hand lever86, the clutch member 71 may be selectively moved into and .out ofdriving engagement with one or the other of the gears 65 and 66. Thethreaded engagement of rod 91 and yoke 91A provides an adjustmentwhereby the neutral position of clutch member 71 corresponds to thevertical position of hand lever 86.

The control lever 87 is likewise provided with an offset extension 95having similarly adjustable rod and yoke connection 96 connecting itwith a similar arm 97 secured to a crank shaft 98, having a dependingarm 99 operatively connected with the clutch member 78, as shown inFigure 5. In like manner, the hand lever 88 is suitably connected bysimilarly adjustable rod and yoke connection 101 to an arm 102 securedto a crank shaft 103 having an operative connection with the clutchmember 85. The control levers 86, 87, and 88 are shown loosely mountedupon a shouldered stud or rod 104 fixedly supported in a bracket 105secured to the upper portion of the gear case 38 by suitable bolts 106,as shown in Figures 4, 5, and 6.

Each arm 92, 97, and 102 is shown provided on its inner side with asmall socket 107 adapted to receive the head of a spring-actuated bolt108 mounted in a recess or bore 109 provided in the wall of the gearcasing 38, as best shown in Figure 8. 'I'hese bolts are adapted toretain the arms 92, 97, and 102 in their vertical positions. Each arm92, 97, and 102 is provided with laterally extending portions 111adapted to engage the head of the bolt 108 when the arms are in one orthe other of their operative positions, as will readily be understood byreference to Figures 4 f and 8.

Another feature of the invention resides in the means provided forautomatically returning the control levers 86, 87, and 88,to theirnormal inoperative or neutral positions, when the operator releases hisgrip thereon. Such means is shown in detail in Figures 9 and 10, andconsists of shaping the teeth 68, 76, and 83 of the gears 65, 74, and81, respectively, and the teeth of the clutch members 71, 78, and 85 insuch a manner that a pressure must be exerted against the control levers86, 87, and 88 to retain the clutch members in operative engagement withthe clutch teeth of their respective gears.

To thus cause the clutch members to automatically return to theirneutral positions when the operator releases his grip upon the controllevers,

engagement with their respective clutchteeth, as will readily beunderstood by reference to Figure 10, wherein the arrow indicates thedirection of travel of the teeth of the gear 74 and the clutch member78.

As hereinbefore stated, the face angles of the clutch teeth are suchthat the clutch members will be automatically moved in a lengthwisedirection upon their respective control shafts, into neutral positions,when the operator releases his grip upon the control levers 86, 87, and88. To retain the clutch members in their operative positions, theoperator must exert a pressure against the control levers.

The above described power-operated control mechanism greatly simplifiesthe work of relatively adjusting the positions of the groundengagingtools of the road machine. The hand levers 86 and 87, controlling theoperation of the scraper blade, are positioned in close proximity sothat the operator may manipulate both of these levers with one hand.When the two levers are moved in one direction simultaneously, both endsof the scraper blade may move upwardly, and conversely, when the leversare moved in the opposite direction, the scraper blade may movedownwardly. If it is desired to adjust but one end of the scraper blade,one control lever only is manipulated. It will thus be seen that bothends of the scraper blade are adapted for independent adjustment.

The hand lever 88 controls the vertical adjustment of the scarier 20.When this lever is moved in one direction, the scarier will be elevated,and when moved in the opposite direction, it will be lowered.

As hereinbefore stated, the angles of the engaging faces of the clutchteeth are such as to cause the automatic return of the clutch members totheir neutral positions, when the operator releases his pressure uponthe control levers. This feature is important in that it provides meanswhereby the clutch members will automatically return to their normalinoperative positions in the event that the operator should accidentallyrelease his grip upon the control levers. The telescopic shafts and alsotheir universal connections With their respective control shafts, permitfree swinging movement of the tractor with respect to the grader whenthe apparatus is in use.

In the drawings, I have shown the invention applied to a road workingapparatus consisting of a grader drawn by a tractor. It is to beunderstood, however, that the invention may also be applied to a roadworking machine having a power unit mounted directly thereon forpropelling it.

I claim as my invention:

1. In a road working apparatus, a grader having a scraper blade, liftingdevices for adjustably supporting said blade, a power-operated controlmechanism for actuating said lifting devices, said mechanism being ofunitary construction and including a plurality of control shafts havingoperative connections with said lifting devices, a clutch member on eachcontrol shaft, a plurality of gears journalled for rotation about saidshafts driven from a source of power and adapted for interlockingengagement with said clutch members, and means for shifting said clutchmembers into and out of interlocking engagement with said gears toselectively control the operation of said lifting devices.

2. In a road working apparatus, a grader having a scraper blade, liftingdevices for adjustably supporting said blade, a power-operated controlmechanism for actuating said lifting devices. said mechanism being ofunitary construction and including a plurality of control shafts havingoperative connections with said lifting devices,aclutch member slidableon each control shaft, intermeshing gears journalled for rotation aboutsaid shafts and adapted for interlocking engagement with said clutchmembers, and means for shifting said clutch members into and out ofinterlocking engagement with said gears to selectively control theoperation of said lifting devices.

3. In a road working apparatus a grader provided with a plurality ofground-engaging tools,

lifting devices for adJustably supporting said tools, a power-operatedcontrol mechanism for said lifting devices including a plurality ofcontrol shafts having operativev connections therewith, intermeshinggears mounted for rotation about said control shafts, means forcontinuously rotating said gears, members slidably and nonrotatablymounted upon said control shafts and adapted for interlocking engagementwith said gears, and means for shifting said members into and out ofinterlocking engagement with said gears to selectively control theoperation of said lifting devices.

4. In a road working apparatus a grader provided with a plurality ofground-engaging tools, lifting devices for adjustably supporting saidtools, a power-operated control mechanism for said lifting devicesincluding a plurality of control shafts having operative connectionstherewith, intermeshing gears mounted for rotation about said controlshafts, continuously rotated from a source of power, members slidablyand non-rotatably mounted upon said control shafts and adapted forinterlocking engagement with said gears, and means for manually shiftingsaid members into and out of interlocking engagement with said gears toselectively control the operation of said lifting devices.

5. In a road working apparatus a grader provided with a ground-engagingtool, lifting devices on the grader for adjustably supporting said tool,a bracket having a shaft extension mounted therein and connected with asource of power, a casing supported upon said bracket and having aplurality of control shafts mounted therein, intermeshing gears mountedfor relative rotation about said shafts, an intermediate shaft mountedin the casing and operatively connected with said shaft extension andsaid gears whereby the latter constantly rotates, means connecting thecontrol shafts with said lifting devices, and clutch means foroperatively connecting said control shafts with said gears whereby thelifting devices may be selectively actuated to relatively adjust theposition of the grader tool.

6. In a power-operated control mechanism for relatively adjusting thepositions of the groundengaging tools of a road working machine, acasing, a plurality of control shafts mounted therein and havingoperative connections with the grader tools, a power-driven shaft, aplurality of intermeshing gears mounted for rotation about said controlshafts and having operative connections with said power-driven shaftwhereby they are adapted for continuous rotation, clutch teeth on saidgears, a clutch member slidably and nonrotatably mounted upon eachcontrol shaft, and means for selectively moving said clutch members intoand out of interlocking engagement with the clutch teeth on said gearsto control the operaerative connections with said power-driven shaftrelatively adjusting the positions of the groundengaging tools of a roadworking machine, a casing, a plurality of spaced-apart control shaftsmounted therein and having operative connections with the grader tools,a power-driven shaft, a plurality of intermeshing gears mounted forrotation about said control shafts and having opwhereby they are adaptedfor continuous rotation, clutch teeth on the inner sides of said gears,a clutch member slidably and non-rotatably mounted upon each controlshaft between gears mounted thereabout, and means for selectively movingsaid clutch membersinto and out of interlocking engagement with theclutch teeth of their respective gears to control the operation of saidcontrol shafts, when raising or lowering the grader tools, said controlshafts being adapted to be operated simultaneously.

8. In a power-operated control mechanism for relatively adjusting thepositions of the ground engaging tools of a grader, a casing having aplurality of spaced-apart control shafts mounted therein and vhavingoperative connections with the grader tools, a pair of gears rotatablymounted about each control shaft, and the gears of one lcontrol shaftintermeshing with the gears of another, clutch teeth upon said gears, aclutch member slidably and non-rotatably mounted upon each control shaftbetween the gears mounted thereabout, means for selectively shiftingsaid clutch members into and out of driving engagement with theirrespective gears, and the engaging faces of the clutch teeth of saidgears and said clutch members being at an angle whereby when theoperator releases his grip upon said clutch shifting means, duringoperation of said mechanism, said clutch members will be returned totheir normal positions.

9. In a power-operated control mechanism for relatively adjusting thepositions of the ground engaging tools of a grader, a casing having aplurality of spaced-apart control shafts mounted therein and havingoperative connections with the grader tools, a pair of gears journalledfor rotation about each control shaft and the gears cf one control shaftintermeshing with the gears of another, clutch teeth upon said gears, amember slidably and non-rotatably mounted upon each control shaftbetween the gears associated therewith and provided'with teeth adaptedfor interlocking engagement with the teeth on said gears, means forselectively shifting said clutch members into and out of drivingengagement with their respective gears, and the effective faces of theteeth on said gears and said slidable members being disposed at an angleof suflicient amplitude to cause said members to move out of drivingengagement with their respective gears, when the operator releases hisgrip upon said clutchshifting means.

10. In a control mechanism for controlling operation of power-operatedadjusting mechanisms for adjusting the earth working implements of aroad machine, a casing, a plurality of driven shafts mounted thereinhaving operative connections with the adjusting mechanism, apower-operated driving shaft, a plurality of gears mounted for rotationabout said driven shafts and continuously driven from said drivingshaft, clutch teeth on said gears, clutch elements slidably andnon-rotatably mounted on said driven shafts, and means for shiftingselected clutch elements to establish the drive for associated adjustingmechanisms.`

11. In a power-operated control mechanism for adjusting the earth movingmeans of a road working machine, a casing, a plurality of control shaftsmounted therein and having operative connections with saidearth movingmeans, a power-driven shaft, a plurality of intermeshing gears mountedfor rotation about said control shafts and having operative connectionswith said power-driven shaft whereby they are adapted for continuousrotation, clutch teeth on said gears, a clutch member slidably andnon-slidably mounted upon each control shaft, and means for selectivelymoving said clutch members into and out of interlocking engagement withthe clutch teeth on said gears to control the operation of said controlshafts.

12. In a power-operated control mechanism for adjusting the earth movingmeans of a grader, a casing having a plurality of spacedapart controlshafts mounted therein and having operative connections with said earthmoving means, a pair of gears journalled for rotation about each controlshaft and the gears of one control shaft intermeshing with the gears ofanother, clutch teeth upon said gears, a member slidably andnon-rotatably mounted upon each control shaft between the gearsassociated therewith and provided with teeth adapted for interlockingengagement with the teeth ofv said gears, means for selectively shiftingsaid clutch members into and out of driving engagement with theirrespective gears, and the effective faces of the teeth on said gears andsaid slidable members being disposed at an angle of sufficient amplitudeto cause said members to move out of driving engagement with theirrespective gears, when the operator releases his grip upon saidclutch-shifting means.

13. In a power-operated control mechanism for adjusting the earth movingmeans of a road working machine, a casing, a plurality of spacedapartcontrol shafts mounted therein and having operative connections withsaid earth-moving means, a power-driven shaft, a plurality ofintermeshing gears mounted for rotation about said control shafts andhaving operative connections with said power-driven shaft whereby theyare adapted for continuous rotation, clutch teeth on the inner sides ofsaid gears, a clutch member slidably and non-rotatably mounted upon eachcontrol shaft between gears associated therewith, and means forselectively moving said clutch members into and out of interlockingengagement with the clutch teeth of their respective gears to controlthe operation of said control shafts, said control shafts being adaptedto be operated simultaneously.

14. In a pow er-operated control mechanism for adjusting the earthmoving means of a grader, a casing having a plurality of spaced-apartcontrol shafts mounted therein and having operative connections withsaid earth moving means, a pair of gears rotatably mounted about eachcontrol shaft, and the gears of one control shaft intermeshing with thegears of another, clutch teeth upon said gears', a clutch memberslidably and non-rotatably mounted upon each control shaft between thegears associated therewith, means for selectively shifting said clutchmembers into and out of driving engagement with ,their respective gears,and the engaging faces of the clutch teeth 0f said gears and saidvclutch membersbeing at an angle whereby when the operator releases hisgrip upon said clutch shifting means, during operation of saidmechanism, said clutch members will be returned to their normalpositions.

15. In a power-operated control mechanism for adjusting the earthworking parts of a road machine, a casing, a plurality of control shaftsmounted'therein, power-driven clutch elements mounted for rotation abouteach of said shafts, a clutch member slidably and non-rotatably mountedupon each control shaft and adapted to transmit a drive thereto, and ahand lever for each clutch member whereby said members may beselectively moved into and out of driving engagement with theirrespective power-driven clutch elements to control the operation of saidcontrol shafts.

16. In a power-operated control mechanism for adjusting the earthworking parts of a road machine, a casing, a plurality of control shaftsmounted therein, `power-driven clutch elements mounted for rotationabout each of said shafts, a clutch member slidably and non-rotatablymounted upon each control shaft, and a hand lever for each clutch memberwhereby said members may be selectively moved into and out of drivingengagement with their respective powerdriven clutch elements to controlthe operation of said control shafts, said clutch elements and membersincluding means automatically causing the return of said hand levers toneutral positions, when said mechanism is functioning and the operatorreleases his pressure thereon.

17. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, clutch means in said casingcomprising a train of spur gears, and means adapted to be driven by saidspur gears.

18. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, reversible clutch means in saidcasing comprising opposite trains of spur gears.

19. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a source of power, a casing, clutch meansmounted in said casing comprising opposite trains of gears continuouslyrotated from said source of power.

20. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, clutch means in said casingcomprising a train of spur gears, adjacent spur gears being intermeshedwith each other, and means adapted to be driven by said spur gears.

21. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, clutch means mounted in said casingcomprising a train of intermeshing spur gears having clutch teeth formedon one face thereof.

22. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, a plurality of parallel shaftsmounted therein, and opposite trains of spur gears mounted for rotationabout said shafts.

23. In a power-operated control mechanism for adjusting the earth movingmeans of a road -machine, a casing, clutch means mounted in said casingcomprising a plurality of trains of spur gears having clutch teethformed on one face thereof.

24. In a power-operated control mechanism for adjusting the earth movingmeans of e road machine, a casing, spaced shafts mounted in said1,esc,147

casing, opposite trains of spur gears mounted for rotation about saidshafts having clutch teeth formed on the opposed faces thereof, anddouble- .faced clutch elements slidably and non-rotatably mounted onsaid shafts to engage associated spur gears.

25. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, spaced shafts mounted in said casing,opposite trains of spur gears mounted for rotation about said shaftshaving clutch teeth formed on the opposed faces thereof.

26. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, reversible clutch means in saidcasing comprising opposite trains of spur gears, adjacent gears of saidtrains being intermeshed with each other.

27. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, spaced shafts mounted in said casing,opposite trains of spur gears mounted for rotation about said shaftshaving clutch teeth formed on the opposed faces thereof, adjacent gearsofsaid trains being intermeshed, and double-faced clutch elementsslidably and non-rotatably mounted on said shafts to engage the clutchteeth of associated spur gears.

28. In a road working apparatus, a drawn vehicle, adjustable means onsaid vehicle, means for adjusting said adjustable means including aplurality of shafts having their ends terminating in substantiallyvertical alignment at the front of the vehicle, a draft vehicle adaptedfor short turning, a draft connection from the draft vehicle to thedrawn vehicle, power control means on said draft vehicle including aplurality of vertically spaced parallel shafts having their rear endsvertically aligned, and connections from said parallel shafts to saidfirst shafts, each connection including an extensible telescopic shaftuniversally connected to one of said first shafts and to one of saidparallel shafts, said connections lying substantially in the samevertical plane.

29. A road working apparatus including a frame, a ground-engaging tool,lifting devices for adjustably supporting said ground-engaging tool uponsaid frame, a source of power, a power-operated clutch mechanismincluding driving clutch elements constantly driven from said source ofpower, shiftable driven clutch elements having constant operativeconnections with said lifting devices, and means for manually movingsaid driven clutch elements to operative position, said elementsincluding cam means for automatically rendering said driven clutchelements inoperative, when said manual means are released.

30. In a road working apparatus, a graderl having lifting devices foradjustably supporting the ground-engaging tools thereof, a clutchmechanism for actuating said lifting devices, said clutch mechanismincluding a plurality of interconnected driving clutch elementsconstantly driven from a source of power, a plurality of slidable clutchmembers, and means for manually moving said clutch members intooperative positions whereby said lifting devices may operate torelatively adjust the positions of the grader tools with reference tothe ground, said elements and members including non-resilient meanstending normally to return said clutch members to normal inoperativepositions.

31. In a road working apparatus, a road machine, adjustableearth-working implements on said machine, means for adjusting saidimplements including a plurality of shafts having their ends terminatingin substantially vertical alignment at the front of the machine, atractor adapted for short turning, a draft connection from the tractorto the road machine, power control means on said tractor including aplurality of vertically spaced parallel shafts having their rear endsvertically aligned, and connections from said parallel shafts to saidfirst shafts, each connection including an extensible telescopic shaftuniversally connected to one of said first shafts and to one of saidparallel shafts, said connections lying substantially in the samevertical plane.

32. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, normally idle, spaced shafts mountedin said casing, opposite trains of gears mounted for normally constantrotation about said shafts, adjacent gears of said trains being linterconnected, clutch means on the opposed faces of said gears, anddouble-faced clutch elements having a driving connection with saidshafts and engageable with the clutch means of associated gears todetermine operation of said shafts thereby.

33. In a power-operated control mechanismrfor adjusting the earth movingmeans of a road machine, a casing, normally idle, spaced shafts mountedin said casing, opposite trainsof gears mounted for normally constantrotation about -said shafts, adjacent gears of said trains beinginterconnected, and clutch means associated with the opposed faces ofsaid gears for determining operation of said shafts thereby.

34. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, a plurality of normally idle shaftsjournalled on said casing and adapted to be rotatably driven, aplurality of spaced gears journalled about each of said shafts, adjacentgears on said shafts being interconnected, power driven means foreffecting normally constant rotation of said gears, and means forselectively connecting said gears to said shafts to rotate said shaftsin either direction, including a shiftable clutch element slidably andnon-rotatably mounted on each of said shafts.

35. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, a plurality of parallel shafts,bearing means mounting said shafts in said casing, opposite trains ofgears mounted on said bearing means for rotation about said shafts, thegears of each train being connected for simultaneous rotation, a pair ofopposite bevel gears, each bevel gear having a driving connection withone of said trains of gears, a power driven bevel gear engaging saidpair of bevel gears for rotating said trains of gears simultaneously,opposite gears of said trains rotating oppositely, clutch means on theopposed faces of said gears, and double faced clutch elements slidablyand nonrotatably mounted on said shafts between said trains of gears andengageable with respective opposite gears of said trains to rotate saidshafts selectively in either direction.

36. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, a pluralityr of parallel shafts,

bearing means mounting said shafts in said casing, opposite trains ofgears mounted on said bearing means for rotation aboutv said shafts,

the gears of each train being connected for simultaneous rotation, apair of bevel gears integral with one opposite pair of gears of saidtrains, a power-driven bevel gear engaging saidpair of opposite gearswhereby opposite gears of said respective trains are driven oppositely,and means for selectively connecting said shafts with gears for rotationthereby.

37. In a power-operated control mechanismfor adjusting the earth movingmeans of a road machine, a casing, a plurality of normally idle parallelshafts mounted for rotation in said casing, opposite trains of gearsmounted for rotation about said.r shafts, the gears of each train beingconnected for simultaneous rotation, a power-driven gear having adriving connection with an opposite pair of gears of said respectivetrains for effecting normally constant rotation thereof, opposite gearsof said respective trains rotating oppositely, and means for selectivelyconnecting said gears to said shafts to determine rotation thereof in aselected direction.

38. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, a plurality of normally idle parallelshafts mounted for rotation in said casing, opposite trains of gearsmounted for rotation about said shafts, the gears of each train beingconnected for simultaneous rotation, means for effecting normallyconstant rotation of said gears, and means for selectively connectingsaid gears to said shafts to rotate said shafts in either direction.

39. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a casing, a plurality of normally idle parallelshafts mounted for rotation in said casing, a plurality of spaced clutchmembers journalled about each of said shafts, adjacent clutch membersbeing interconnected for simultaneous rotation, power-driven means foreffecting normally constant rotation of said clutch members, and meansfor selectively connecting said members to said shafts to rotate saidshafts in either direction, including a shiftable clutch elementslidably and non-rotatably mounted on each of said shafts.

40. In a road working apparatus, a plurality of devices adapted to bemoved, a source of power including a power shaft for operating saiddevices, a power control box having shafts operatively connected withsaid devices and clutching means for said shafts, means for mountingsaid control box including a tubular bracket, and means for transmittinga drive from said power shaft to said control box shafts including ashaft extending through and housed by said bracket.

41. In a road working apparatus, a plurality of devices adapted to bemoved, a source of power including a power shaft for operating saiddevices, a power control box having shafts operatively connected withsaid devices and clutching means for said shafts, said power control boxbeing spaced from said power shaft, means for transmitting a drive fromsaid power shaft to said control box shafts including a connecting shaftbetween said power shaft and said control box, and means forhousing andprotecting the drive between said control box and said power shaftincluding a tubular member about said connecting shaft. v

42. In a power-operated control mechanism for adjusting the earth movingmeans of a road machine, a plurality of spaced shafts, a train of gearsincluding a gear journalled for rotation about each shaft, a secondtrain of gears spaced with respect to said first train of gears and alsoincluding a gear journalled for rotation about each shaft, means forrotating said trains of gears, opposite gears associated with each shaftrotating oppositely, and clutching means for each shaft shiftabletherealong to establish a drive connection with either of said gearsabout said shaft whereby each shaft can be rotated in a selecteddirection.

43. In a road working apparatus, a grader provided with lifting devicesfor the ground-engaging tools thereof, a power-operated controlmechanism for actuating said lifting devices, a tubular supportingbracket for said control mechanism, and a shaft extension mounted insaid bracket and extending therethrough for operatively connecting saidcontrol mechanism with a source of power, said bracket entirely housingsaid shaft extension.

44. In a road working apparatus, a draft vehicle, a drawn vehicle havingadjacent an end thereof ground supporting means spaced from said draftvehicle and mounted fox` turning movement about an upright axis, a draftconnection located between said end of said drawn vehicle and said draftvehicle, adjustable earth working means on said drawn vehicle, and meansfor operating said adjustable earth working means including shaftshaving a pivotal connection located substantially in line with saidupright axis and adjacent said end of said drawn vehicle.

45. In a road working apparatus, a draft vehicle, a drawn vehicle havingadjacent an end thereof ground supporting means spaced from said draftvehicle and mounted for turning movement about an upright axis, a draftconnection located between said end of said drawn vehicle and said draftvehicle, a plurality of adjustable means on said drawn vehicle, andmeans for operating any of said plurality of adjustable means includingshafting having a plurality of pivotal connections substantially alinedwith respect to each other and adjacent said upright axis.

46. In a road working apparatus, a draft vehicle having an operatorsstation adjacent an end thereof, a drawn vehicle having adjacent an endthereof supporting means mounted for turning movement about an uprightaxis, a draft connection located between said end of said drawn vehicleand said end of said draft vehicle and having a pivotal connectionadjacent said end of said draft vehicle, a plurality of adjustable meanson said drawn vehicle, a unit for selectively controlling any of saidplurality of adjustable means positioned adjacent said operators stationend of said draft vehicle and above said pivotal connection, saidcontrol unit including a pluralityr of shafts having ends terminating inalinexnent, a

plurality of shafts on said drawn vehicle connected to said adjustingmeans and having ends terminating in substantial alinement with saidupright axis, and telescopic shafting between said shaft endsanduniversally connected thereto.

47. In a road working apparatus, a draft vehicle having an operator'sstation adjacent an end thereof, a drawn vehicle having adjacent an endthereof supporting means mounted for turning movement about an uprightaxis, a draft connection between said end of said draft vehicle and saidend of said drawn vehicle, adjustable means on said drawn vehicle, meansfor operating said adjustable means from adjacent said operator'sstation including an extensible telescopic shaft located between saiddraft vehicle and said drawn vehicle, and means for rendering the lengthof said extensible telescopic shaft substantially unaffected by relativeturning movement between said draft vehicle and said drawn vehiclecomprising a pivotal connection for one end of said shaft locatedsubstantially in line with said upright axis and a pivotal connectionfor the opposite end of said shaft located adjacent said operator'sstation.

48. In a road Working apparatus, a draft vehicle having an operatorsstation adjacent an end thereof, a drawn vehicle having adjacent an endthereof supporting means mounted for turning movement about an uprightaxis, a draft connection between said end of said draft vehicle and saidend of said drawn vehicle, a plurality of adjustable means on said drawnvehicle, means for selectively operating said adjustable means fromadjacent said operators station including a plurality ofextensibletelescopic shafts located between said draft vehicle and saiddrawn vehicle. and means for rendering the lengths of said telescopicshafts substantially unaffected by relative turning movement betweensaid draft vehicle and said drawn vehicle comprising pivotal connectionsfor one set of ends of said shafts located in substantial verticalalinement with said upright axis and pivotal connections for the othersets of ends of said telescopic shafts located adjacent said operator'sstation.

49. In a road working apparatus, a draft vehicle having an operator'sstation adjacent an end thereof, a drawn vehicle, a .draft connectionbetween said drawn vehicle and said draft vehicle, a plurality ofadjustable means on said drawn vehicle, and means for selectivelyadjusting said adjustable means from adjacent said draft vehiclecomprising a control unit including a plurality of shafts having endsterminating'in substantial vertical alinement adjacent said end of saiddraft vehicle, and extensible telescopic shafting movably connected withsaid ends.

CARL A. GUSTAFSON.

